Magnetic pressure indicator for a container

Electricity: circuit makers and breakers – Fluid pressure – Diaphragm

Patent

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Details

200 83C, 340240, 73410, 337321, H01H 3532

Patent

active

039461750

ABSTRACT:
A temperature compensated pressure indicator adapted to be mounted within a pressure container includes a reservoir housing and housing member welded together to form a secondary pressure chamber. A bellows member is hermetically mounted within the secondary pressure chamber and communicates with the exterior pressure of the container. Mounted on the bellows member is a movable magnetic member adapted to slide on a hollow guide post as a result of any pressure differentials. A reed switch assembly is held stationary in the guide post by a pair of band springs. The switch assembly is electrically connected to a source of power and an external indicator such as a light. When the bellows member moves the magnetic member close to the switch assembly due to a pressure differential, the magnetic field closes the switch assembly to activate the light. The indicator is substantially non-responsive to wide variations in the ambient temperature.

REFERENCES:
patent: 3042771 (1962-07-01), Oliveay
patent: 3046369 (1962-07-01), Hicks
patent: 3206572 (1965-09-01), Buehler
patent: 3342959 (1967-09-01), Breunich
patent: 3576412 (1971-04-01), Davin
patent: 3735376 (1973-05-01), Kermer

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